package com.dong.singletonMode;

/**
 * @author DongJiaQi
 * @create 2022/12/20 16:38
 * @Description: 使⽤类的内部类(线程安全)
 */
public class Singleton_04 {
    private static class SingletonHolder {
        private static Singleton_04 instance = new Singleton_04();
    }
    private Singleton_04(){

    }
    public static Singleton_04 getInstance() {
        return SingletonHolder.instance;
    }
}
